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Finding the Fourth Proportional to 287,460.03, 431,286 and 127,513.89

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Solution

The fourth proportional to 287,460.03, 431,286 and 127,513.89 is: 191,313.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,460.03 : 431,286 = 127,513.89 : x
  2. Step 2: Convert to fraction form
    287,460.03/431,286 = 127,513.89/x
  3. Step 3: Cross multiply
    287,460.03x = 431,286 × 127,513.89
  4. Step 4: Simplify right side
    287,460.03x = 54,994,955,562.54
  5. Step 5: Solve for x
    x = 54,994,955,562.54/287,460.03
  6. Step 6: Final answer
    x = 191,313.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.